piezoresistive material

piezoresistive material

[pē¦ā·zō·ri¦zis·tiv mə′tir·ē·əl]
(materials)
A metal or semiconductor in which a change in electrical resistance occurs in response to changes in the applied stress.
References in periodicals archive ?
The VDP sensor is usually made of piezoresistive material such as silicon, and its resistance can be measured from knowing the current ([I.sub.AB]) and voltage ([V.sub.CD]).
The original theory was developed first by van der Pauw [5, 6] to calculate the "change in resistance" for a given piezoresistive material. For a planar isotropic piezo-resistive conductor of arbitrary shape with no discontinuity, VDP theorem defines the "resistance" -[R.sub.AB,CD] as the potential difference ([V.sub.D] - [V.sub.C]) between contacts D and C per unit current through contacts A and B, [I.sub.AB] (see (1)).
For example, polypyrrole is a piezoresistive material combined with rubbers to create elastic, electrically conductive yarns [9].
Uneo Inc.'s Uneo Ultra Compact Stylus Force Sensor, based on patented Micro-Deformable Piezoresistive Material, enables pressure sensitivity in an active electronic stylus for touchscreen-enabled products, such as a cell phone, a tablet computer or a digital white board.
Polysilicon is chosen as the piezoresistive material which senses the movement of the membrane.
Four copper contact pads are used on the piezoresistive material, two for supply voltage input and two for sensor outputs as shown in Figures 4 and 5.
Silicon exhibits a high gauge factor and is principally applicable as a piezoresistive material up to temperatures of 400[degrees]C [7].
The instrument is made of a piezoresistive material that changes voltage as its capacitance is altered by gas velocity.
Due to imperfections in manufacturing and non-ideal contact between the piezoresistive material and the electrodes, there are different responses from neighbouring cells for the same stimuli (up to 5% of the whole range).
Through various design configurations, piezoresistive materials can be used for force, pressure, and flexure sensing [1, 3].
Chen, "Piezoresistive materials from directed shear-induced assembly of graphite nanosheets in polyethylene," Advanced Functional Materials, vol.
Key words: tactile sensors, piezoresistive materials, robotics, PVDF, piezoelectricity, object recognition